Low pressure combustion process of synthesizing alpha-phase silicon nitride powder
Title：
Low pressure combustion process of synthesizing alpha-phase silicon nitride powder
Application Number：
 02100183
Application Date：
 2002/01/22
Announcement Date：
 2002/08/07
Pub. Date：
Publication Number：
 1362358
Announcement Number：
 1173880
Grant Date：
 2004-11-3
Granted Pub. Date：
 2004-11-3
ApplicationType：
 Invention
State/Country：
 11[China|beijing]
IPC：
 C01B 21/068, C04B 35/584, C04B 35/64
Applicant(s)：
 Qinghua Univ.
Inventor(s)：
 Chen Kesi, Zhou Heping, Ge Zhenbin
Key Words：
 Low pressure combustion, synthesizing, alpha-phase silicon nitride powder
Abstract：
 The method for synthesizing high alpha-phase silicon nitride powder body by utilizing low-pressure combustion includes the following steps: firstly, pretreating raw material metal silicon powder, according to proportion adding activating agent, diluting agent and additive, ball grinding, fully mixing them, drying, placing them into low-pressure combustion synthesis reaction equipment, evacuating, blowing nitrogen gas into the reaction equipment from bottom, inducing to combustion to implement suspension nitrogenation at low pressure. The purity of said invented product is high, and its alpha-phase content is high.
Claim：
Priority：
PCT：
LegalStatus：

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